Financial Instruments and Commodity Contracts - Foreign Currency Contracts (Details) (Foreign Exchange Contract [Member]) In Millions, unless otherwise specified	Jul. 31, 2014 USD ($)	Jul. 31, 2014 EUR (€)	Oct. 31, 2013 EUR (€)	Jul. 31, 2014 Contract 1 [Member] USD ($)	Jul. 31, 2014 Contract 1 [Member] CAD	Oct. 31, 2013 Contract 1 [Member] USD ($)	Oct. 31, 2013 Contract 1 [Member] CAD	Oct. 31, 2013 Contract 2 [Member] CAD
Derivative [Line Items]
Derivative, Notional Amount	$ 3	€ 20	€ 2	$ 4	5	$ 25	90	50